You can tell if it's a separate graphics card without opening the box. If 
the connector is where the kayboard.mouse/serial/USB ports are on the 
back, then it's part of the motherboard. If the connector is in an 
extension slot, it's an extension card.

On Sun, 25 Jan 2015, Brian Wood wrote:

> 
> I have a computer where the images are moving around a
> little bit, making it kind of hard to use.  At first I figured it
> was the monitor, and I moved the monitor to another computer.
> The images were fine when connected to a different machine,
> so I guess it wasn't the monitor after all.  Then I rebooted the
> original computer, but the problem remained.  So now I'm
> thinking the problem may be with the graphics card or
> motherboard.  I haven't opened the box up to check if there's
> a separate graphics card or not.  Is there anything else you
> suggest checking?  Tia.
> 
> --
> Brian
> Ebenezer Enterprises - "When the righteous are in authority,
> the people rejoice; but when a wicked man rules, the people
> groan."  Proverbs 29:2
>  
> http://webEbenezer.net
> 
> 
> 
> 
>